MovieRob’s Favorite Trivia – The inspiration for the film came from a childhood experiment between director Jeff Lieberman and his brother. One evening the two hooked up a train transformer to wet soil and used the electricity to drive hundreds of worms out of the ground. Young Lieberman noticed that the worms tried to get away from the glare of the flashlight that the boys were using to see by because worms are light-sensitive. It became the scientific basis behind this film and the story of the experiment is re-told by the character of Roger Grimes. (From IMDB)